Voltage regulator system for a genset

Abstract

A voltage regulator system for regulating an output voltage of a genset includes a voltage regulator for reducing terminal voltage in response to a reduction in terminal frequency. A plurality of under-frequency roll-off (UFRO) states is provided in the voltage regulator, with each UFRO state being configured to implement a UFRO characteristic. An operational signal indicative of an operating condition of the genset forms the basis for selection of the UFRO characteristic.

Description

TECHNICAL FIELD[0001]The present disclosure relates generally to engine-generator power systems, and more particularly, to an engine-generator power system having a voltage regulator system.BACKGROUND[0002]An engine-generator or a genset may be a combination of an engine and a generator. Both components may be mounted together to form a single machine. A genset may provide electricity at various locations such as construction sites or emergency response sites. A genset may be a small person-portable device or a larger device that may be mounted on a skid or a trailer, depending on the requirements and location, and the amount of power that is needed for a particular use.[0003]Gensets may be used as a backup power source or a primary power source. If power from a primary power source is no longer available the genset may be used for backup power. The genset may be shutdown when the primary source is made available again. The genset may also be used as a primary power source. In this ...

AI Technical Summary

Benefits of technology

This patent describes a method for regulating the output voltage of a collection of generators. The method involves monitoring the status of the generators, sending the information about that status to a controller, and selecting a specific way to reduce the voltage based on the status. This results in a more efficient way to control the output of the generators and ensures that they operate at the best possible level.

Problems solved by technology

Cold gensets may be less efficient than gensets that are warm or hot.

Thus, a genset that has not been in operation for an extended period may have a poor load acceptance.

Loss of thermal energy produced from combustion through the cylinder walls will heat the engine block and cylinder head, its coolant, oil and other components and may finally be lost into the environment.

In addition, at lower temperatures the lubricating oil's higher viscosity may lead to increased pumping and frictional losses within the engine.

These increased losses, in combination with lower combustion efficiency, lead to reduced cold engine performance.

With the introduction of engines with electronic control, the maximum fuel quantity delivered per stroke is also commonly limited until the engine has warmed.

These techniques may reduce the engine's output power further thereby reducing the genset load acceptance capability when cold.

The practice may increase the operating cost to the site operator.

When the first condition of the switching device is active, the performance module may be overridden, the engine may be operated at a reduced speed and load output, and the generator may be inhibited from producing electrical power.

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